(WMS)Piping Installation Around Eqipment Procedure(AFC)REV.F#

Rev. no Date of rev. Description Prepared by

Checked by

Approved by

2

1

0 03 Jan.2011 Issued for review

Project name PNG LNG Plant ProjectDocument name ERECTION OF PIPE AROUND EQUIPMENTDocument number PGLN-YF-KPMTH-90K010-021Rev. no / Page 0 / 1 of 18

PNGPNG LNG Plant Project

CHIYODA-JGC JOINT VENTURESC NO. : REQ NO. : DW-PIPE-011IDENT NO. : PGLN-YF-KPMTH-90K010-021 Rev.no : 0ITEM NO. :

A-Reviewed withNo comments

Section :

B-Reviewed with Comments as noted

Signature :

C-Do not proceed withConstruction workD-Received as information Date :CJJV Internal Use

Category A B C DDFO Requirement

CJJV(CONTRACTOR)PERMISSION TO PROCEED OR REVIEW

TAKEN ON SUBCONTRACTOR DOCUMENTS SHALL NOT NOT RELIEVE

UNDER SUBCONTACT AGREEMENT.

Doc. name ERECTION OF PIPE AROUND EQUIPMENT Doc. no PGLN-YF-KPMTH-90K010-021 Rev. 0

C O N T E N T S

1.0 PURPOSE

2.0 SCOPE OF WORK

3.0 CONSTRUCTION REFERENCE AND DOCUMENTS

4.0 4.1 4.2 4.3 4.4

RESOURCES ORGANIZATION CHART FOR PIPING ERECTION RESPONSIBILITIES MANPOWER TOOLS AND EQUIPMENT

5.0 GENERAL ACTIVITIES

6.0 6.1

6.26.36.4

ACTIVITIES DESCRIPTIONS AND DETAILED METHODPIPING INSTALLATION AROUND EQUIPMENT WORK-FLOWAROUND HEAT EXCHANGER PIPINGAROUND AFC PIPINGOTHER EQUIPMENT PIPING

7.0 ERECTION AND INSTALLATION INSTRUCTION

8.0 TEMPORARY FACILITIES

9. 0 QUALITY CONTROL REFERENCES

10.0 TASK ANALISYS AND HSE REFERENCES

11.0 ATTACHMENTS

2 of 18


1.0 PURPOSEThe purpose of this Work Method Statement is to control installation activities of piping erection around equipment, especially around E-1411,E-1412,E-1415A/B and AFC undertaken by SUBCONTRACTOR, and to ensure that the required quality is achieved to Project Specification Codes and Standards, Russian codes and standard.

2.0 SCOPE OF WORK This Work Method Statement describes the erection methods for pipes that shall be erected around equipment except on pumps and compressors of Sakhalin LNG Project.

3.0 CONSTRUCTION REFERENCES AND DOCUMENTS

DOC. NO. DOC. TITLEDEP 30.10.60.18 Welding of MetalsDEP 31.38.01.31 Shop and Fabrication of PipingDEP 31.38.01.11 Piping – General RequirementANSI B31.3 Process Piping7000-E-90-10-S-0001-01 Technical Specification for General Welding

Requirement 7000-E-90-10-S-0006-01 Technical Specification for Prevention of Stainless

Steel Zinc Embrittlement7000-E-90-10-S-0008-01

Technical Specification for Welding-Quality Control Requirements During Site Construction

7000-E-90-38-S-0001-01 Piping Class Summary7000-E-90-38-S-0002-01 Piping Material Specification7000-E-90-38-S-0004-01 Technical Specification for Valve Locking And

Interlocking Devices7000-E-90-38-S-0006-01 Technical Specification for Sequencing Ball Valves7000-E-90-38-S-0010-01 Expansion Joint for Cryogenic Service7000-E-90-38-S-0012-01 Technical Specification for Shop and Field

Fabrication of Piping, 7000-E-90-38-S-0013-01 Specification for Piping General Requirements7000-E-00-10-S-0227 Material Identification and Traceability7000-E-00-10-S-0429 Scaffolding Procedure7000-E-90-38-P-1006-01 Inspection and Test Plan Piping field Erection7000-E-90-38-P-1011-01 Inspection and Test Plan Piping(Adjacent to

Rotating Equipment) Alignment Check7000-E-90-38-P-1012-01 Inspection and Test Plan Installation of Strainer

Element3 of 18


4.0 RESOURCES

4.1 Organization Chart for Piping Erection.Please refer to “Attachment #1” in General Work Method Statement. (Doc.No. 7002-E-00-38-P-3101-01-01)

4.2 ResponsibilitiesConstruction Manager is responsible for:

1) Implementation of this work procedure

P/Erection Superintendent is responsible for:1) Implementation of work activity including preparation of work, delivery of

material, welding, storage, etc.2)Control of welder and daily welding report and submission to Contractor.3)Implementation the latest revised drawing and design change.4) Review of NDE requirements, requisition of NDE and maintenance of NDE

report.5)The implementation of PWHT, and maintenance of report concerned.6)Preparation of ‘Material Requisition’ for field materials7) Control of storage, handling, preservation of materials received from the

Material Control Team for the process of installation.8)Clearance of Pre-Test/ Post-Test Punch Items

QA/QC Team Manager is responsible for:1) Inspection of installation in accordance with relevant ITP.

2) Preparation of inspection record.

3) Handing over QA records to the CONTRACTOR Quality Assurance Manager.

4) Reporting Non-Conformance item(s).

4.3 Manpower The installation work shall be controlled and coordinated by supervisor.The basic manpower shall include but not limited to4.3.1 Pipe Foreman4.3.2 Pipe Fitter4.3.3 Pipe Welder4.3.4 Rigger4.3.5 Scaffolder4.3.6 Helper4.3.7. Equipment Operator 1) Crane Operator

4 of 18


2) Manlift operator

4.4 Tools and equipment 4.4.1 Mobile Crane 200 ton 4.4.2 Hydro Crane 30 ton 4.4.3 Low Bed Trailer 4.4.4 Lifting accessories 4.4.5 Chain Blocks 4.4.6 Air Compressors 4.4.7 Welding Machines 4.4.8 Hand Tools and Fixtures as required 4.4.9 Fixing Jig, Supports

5.0 GENERAL ACTIVITIESPlease refer to “Attachment #1” in General Work Method Statement

(Doc. No. 7002-E-00-38-P-3101-01-01)

6.0 ACTIVITY DESCRIPTION AND DETAILED METHOD

6.1 Piping Installation Around Equipment Work-flow Please refer to attachment # 10.1

6.2 Around Heat Exchanger (E-1411.1412.1415A and B) Piping

6.2.1 Preparation6.2.1.1 After release or hand over of the equipment to piping erection group,

depressurization of the purging gas (Nitrogen) thru a valve shall be conducted under Contractor’s supervision and control. The pressure cap on the nozzle shall be removed only immediately before connecting the nozzle to the piping system.

6.2.1.2 To explain how to control do not exceed the nozzle load include back charge for welding refer to Erection and Installation instruction.

6.2.1.3 Arrange the order for pipe installed around heat exchanger, the crane location and capacity as well as arrangement of workers shall be checked. (Refer erection and installation construction to the Doc. No. 7001-E-14-21-P-0317)

6.2.2 Scaffolding6.2.2.1 Scaffolding work shall be done in a position that are essential for rigging and

welding work and fully concerned with safety and shall be approved for use and inspection by safety manager.

5 of 18


6.2.3 Fabrication of pipe spools6.2.3.1 Pipe spool shall be fabricated in accordance with order of pipe installation and

construction schedule of heat exchanger and all related inspection shall be completed

6.2.4 Permanent and Temporary Support Installation6.2.4.1 All pipe support shall be fabricated and installed and be completed inspection from

the top before pipe spool installation6.2.4.2 When installation of temporary support inevitably, installation in concerning with

safety and damage shall be recovered after removal

6.2.5 Rigging

6.2.5.1 Pipe spool shall be arranged around heat exchanger and pipe spool storage on

the wood, and touch-up painting shall be done if there is a damage in pipe surface

6.2.5.2 Rigging should be done by using sling belt according to weight for pipe spool

6.2.5.3 Crane for rigging shall be set in safe place and appropriated capacity of crane

shall be used by calculating height of heat exchanger and weight of pipe spool

6.2.5.4 Arrange a skilled rigger and set rigger in place for pipe spool installation and near

crane

6.3 Around AFC Piping6.3.1 Pipe header fabrication

Pipe header must be reinforced enough to protect the deformation and damage of

header from much weldolet for branch, before hole cutting and fit-up, and also be

welded in accordance with welding sequence in case of welding.

Please refer to Attachment #10.2

6.3.2 Fabricated pipe spool should be installed as attached sequence.(attachment #10.1)

6.4 OTHER EQUIPMENT PIPING6.4.1 Before installation of piping to perform depressurizing. Dust protection such as thin

plate is required with gasket between equipment nozzle and piping

6.4.2 Flange Face Inspection

6.4.2.1 Surface of flange gasket face shall be free from rust, weld spatter, scars, paint,

6 of 18


dent, arc strikes, corrosion pitting and other imperfection.

6.4.2.2 The criteria of acceptable surface damages shall be as per ASME B16.5 para. 6.45

Flange Facing Finish imperfection, and apply also for pipe sizes above DN

600(24”).

6.4.3 Flange Parallelism Check

1 All pipe-flange fabrication shall be inspected and dimensionally checked prior to

welding to determine their alignment and perpendicularity with respect to

pipe/spool’s centerline.

2 Measurement of flange alignment shall follow the procedure stated below:

1) The line that shall be developed by connecting the two uppermost points of two

opposite bolt holes equidistant from flange’s vertical centerline shall neither develop

an angle of depression nor an angle of inclination

2) The four projected lines tangent to the four quadrant points of flange face, and

parallel with pipe or spool’s horizontal line shall be of equal distances when

measured perpendicularly using an L-square from pipe/spool’s outer surface

3) When pipe/spool’s centerline is at zero degree from the horizontal, the x and y-axis

of the flange’s face shall also be at 0 and 90 degree, respectively. Otherwise, the

flange is not aligned and squared.

3 Alignment and perpendicularity of two connecting flanges during installation of

flanged pipes to pressure vessels, heat exchanger, valves, control valves, inline

instruments, relief valves, and other similar flanged equipment shall be verified by

inspection to ensure that no external stresses shall be left acting against the

equipment after welding due to misalignment. Forced fit-up shall not be allowed,

and any misalignment that may be discovered during fit-up shall be rectified

accordingly.

6.4.4 Gasket Setting

1 Prior to fabrication of gasket, an inspection shall be conducted to check its size, dimension, and ratings that it conforms to its required specifications.

2 Gasket shall be handled very carefully, and inspected from any signs and/or occurrences of corrosion and damage. Gasket they could prejudice quality, safety and integrity of the piping installation shall be rejected and promptly replaced.

7 of 18


3 Order of Flange Bolt Tightness, Refer to procedure for bolt up attachment #10.3

7.0 ERECTION AND INSTALLATION INSTRUCTION HP- Precooler E-1411

LP- Precooler E-1412Main Cryogenic Heat Exchanger-1415 A/BAnd all static equipment

7.1 Installation

7.1.1 General InstructionPressure vessels are normally purged with Nitrogen (N2) gas, an inert gaseous element used to prevent corrosion from within the vessel. This gas is entered into the vessel to get rid of oxygen from coming into direct and prolonged contact with the

inside surface of the vessel. Once the purging process is completed the nozzles of the vessel shall then be sealed tightly with pressure caps to prevent the gas from escaping into the atmosphere. These pressure caps shall only be removed at a time prior to connecting the vessel’s nozzle to the piping system. Exposure of the vessel inside walls/chambers to open atmosphere shall be kept as short as possible.

Duration to nozzles being open shall be kept as short as possible , i.e. cut the cap, inspect and weld the piping consecutively whenever possible. The pressure caps, protection or cover, on nozzles shall be remove only immediately before the connection of nozzle to the piping system. Removing of blankets is only allowed after depressurizing the connecting chamber from nitrogen-over-pressure by installed gauge / valve.Refer to Nitrogen let down procedure(7001-E-14-21-P-0311) for safety aspectsTo avoid ingress of swart it is recommended that the pressure caps shall be cut at horizontal Nozzle position.

During all work around the vicinity of an open nozzle, care must be taken that no particles like slag, scale, rust, welding residues, oil, grease, salt, or moisture etc. can get into the nozzle and thus inside the CWHEs. In case that particles get into the nozzle, it is necessary to remove them (e.g. with vacuum cleaner). The CWHEs are accessible via manholes and visible via handholes according to Dimensional Outline Drawings.

If the CHWEs are installed in the plant, but not yet completely piped, all open

8 of 18


nozzles have to be covered by ply wood. And Foil is not sufficiently secure to ensure avoidance of ingress. Securely fitted blind or other secure means should be used. This is important for nozzle open to the top. In any situation the CWHEs have to be protected from ingress of moisture (rain!) to avoid freezing during operation!

All piping has to be carefully cleaned by purging and dried before connecting to CWHEs. Due to the small pipe diameters the CWHEs may easily be blocked through ingress of slag. This can result in in safety problems due to blocking of the free passage to the safety valve and in operation problem because the heat transfer surface would be partly inactive.

To avoid ingress of the soil particles during start-up and operation it is recommended To install strainer in the let pipes to the CWHE

7.2 Removing of Pressure Caps from Transition Joint Stubs

7.2.1 Check and record that no pressure in inside the nozzles / chamber.

7.2.2 Removal of pressure caps shall be done only by using a cutting disc. At no instance shall the surface temperature of the cap, measured at its heat-affected zone, exceed 350 degree for 30 minutes (for Asahi Transition Joints) to minimize heat transfer by conduction, or the development of an excessive thermal gradient on the base metal of vessel’s connecting nozzle.

7.2.3 For the limitation of temperature at the transition joint there are the following possibilities.-. Continuous cooling during welding with cooling water and application of a spray

protection sleeve (Ref: Welding Procedure Specification No.:TW 108 Rev.5 in Appendix 3)

-. Early interruption of welding before the temperature comes up to the maximal tolerated values. Inter-cooling with pressure air (oil free!) down to a temperature of approx. 40°

7.2.4 Only medium size grinders using medium size cutting disc shall be used during the cutting or removal of pressure caps.

7.2.4.1 Cutting is only allow on the blanket.

9 of 18


DETAIL “ A ”

7.2.4.2 Cutting and grinding has to be done very carefully in order not to damage transition joint stub. The following shall the steps that shall be followed to avoid slag and fine cuttings from entering into the bore of pipes.

1. Cutting shall be performed in such a manner that the penetration of cutting discs shall be gradual, uniform, and evenly distributed throughout the outside circumference of the cap and inwardly towards the center of its axis. Cutting disc’s penetration shall proceed until 80% of cap’s total thickness shall be removed.

2. At 0.20 t remaining, cutting shall be done more gradually, uniformly and tangentially until the cutting disc shall be able to penetrate the entirety of the cap’s thickness.

3. After removal f the cap, the inside surface of the nozzle shall be cleaned of the fine cuttings by using a clean and dry cloth. Cleaning shall be done thoroughly and

completely.

4. The nozzle, removed of its cap, shall be sealed tightly with plastic or wooden covers to prevent incursion of dusts and other foreign particles that could be a cause to corrosion.

7.2.5 Check that the transition joint are not damaged after cutting the pressure caps.

7.2.6 Paint on the surface must be removed before welding.

7.2.7 Edge preparation at the pipe for welding according WPS(by other) Inspect and report cleanliness of pipe internal.

10 of 18


7.2.8 Welding of the pipe of the transition joint stubs.(Doc.No.7001-E-1421-P-0317Appendix 3)

After completion of welding NDE(PT,RT,UT) as require by local rules and By Contractor has to be performed.

7.2.9 Alignment and perpendicularity between the vessel’s nozzle and the connecting piping component shall be thoroughly checked and measured. Forced fit-up shall not be allowed at all times. Any misalignment that shall be discovered during fit-up of the connection shall be rectified immediately and appropriately in order to make the vessel free from excessive external stresses after welding.

7.3 Pressure Test

After piping the pressure test has to be done:

Warning : Connecting piping must be designed for the pressure to be pressurized for CWHEs circuits. The test pressure of the connecting piping and the CWHEs in the circuit to be pressurized must not exceed the allowable value.

Please note : Pneumatic pressure tests are dangerous!

7.3.1 Pressure-testing of the CWHEs on site had to be carried out at 1.25 maximum allowable working pressure of the respective pressure circuit. The maximum allowable working pressure should be indicated on the nameplate.

7.3.2 The metal temperature and the pressure test medium temperature shall not be higher than 50°C of design metal temperature. According to ASME UG-100 Pneumatic Test, the metal temperature during pneumatic test shall be maintained at least 17°C above minimum design metal temperature.

7.3.3 Any deviation require the prior written approval of Linde.

7.3.4 Only a pneumatic test with dry and oil-free air shall be carried out due to difficulties to remove hydraulic test liquid after installation. Residual test liquid might freeze during operation and cause severs damage.

7.3.5 The pressure test shall therefore be carried out under supervision of a responsible person by observing the local applicable protective labor and safety regulation. And contractor procedure for pneumatic pressure testing(7000-E-00-10-S-0431-01)

7.3.6 In there are any indications for a leak in the CWHEs, Vendor has to be informed

11 of 18


immediately.

7.3.7 Testing Pressure shall be recorded as per contractor procedure(7000-E-00-10-S-0431-01) recording /chart record No. withness persons / calibration sheet

8.0 TEMPORARY FACILITIES

Refer to General Work Method Statement

9.0 QUALITY CONTROL REFERENCES

Refer to ITP 7000-E-90-07-P-1006-01”Piping Field Erection”, ITP 7000-E-90-07-P-1011-01”Piping(Adjacent to Rotating Equipment) Alignment Check”, ITP 7000-E-90-07-P-1012-01”Installation of Strainer Element”, ITP-7000-E-90-07-P-1013-01”Installation of Valve Interlocking Devices”

10.0 TASK ANALISYS AND HSE REFERENCES1. Before commencement of work- Worker shall pass physical examination.- Every body shall be inducted at Contractor’s training center.- Subcontractor worker also shall be inducted by HSE team.- Only qualified, certified and trained workers shall be assigned in the work.- Worker shall wear PPE required in accordance with his work activity.- Safety supervisor shall monitor the compliance of entire work crew. - Equipment shall be certified and inspected before using.- Appropriate tool shall be used and color coding shall be done and recorded.- Tool box meeting shall be held by supervisor/foreman every morning before

work.- Adequate access shall be provided and maintained- Suitable lay down area shall be provided for storage of materials and safe

rigging operations.

- Wood for pipe and fitting shall be laid at lay down area before receiving material.

- The area of lay down shall be prepared separately as LTCS pipe, SUS pipe, LTCS fitting, SUS fitting.

- Material receiving and handling shall be under the supervision of a competent person who is present at the worksite.

- Trained workers of bolt tensioning/torquing shall be working only on bolt

12 of 18


tightening.

2. Loading and Unloading of Piping Material and Pipe Spool- A qualified and trained rigger shall be assigned.- Banksman shall be nominated when crane or trolley is working.- Rigging equipment and rigging gear shall be inspected prior to work- Rigging gear shall be certified and inspected before using and shall be color

coded and recorded.- Tag line shall be used to control the suspended material.- Wire sling and hook shall be used for LTCS pipe and web sling shall be used

for fitting for loading and unloading- Barricade and warning signs shall be installed around working area especially

pipe stacking area before the commence of work.- Routes for suspended loads shall be preplanned to avoid endangering

workers. - The crane shall be located on fully compacted area and all of the outriggers

shall be fully extended equally on both sides using suitable grillage as required.

3. Handling of Material- Good access of equipment to work site shall be secured. - Speed Limit shall be kept during driving.- Pipe should be stacked on wood on firm and horizontal ground/place and

shall be anchored by using tri-angled wood.

4. Manual Handling- Manual handing shall be minimized during loading and unloading, if possible.- In case of manual handling, worker shall keep good postures(keeping arm

close to the body, correct grip/hold, chin in, head up, use of check the heavy load body weight), check rough surface and be careful to crushing.

- Workers shall wear PPE, especially long-sleeved coverall and hand gloves.- Worker shall be trained before work.

5. Rigging 1) Suspended load and Falling material

- Rigging work shall be done by skilled and trained riggers, erectors, banks-man and crane operator under the control of supervisor.

- Equipment shall be maintained and calibrated so as to ensure its effective operation and safety function of crane shall be checked daily.

- Barricade and warning sign shall be installed around working area

13 of 18


before commence of work.

- Routes for suspended loads shall be preplanned to avoid endangering workers and lifting location shall be decided by considering the gravity center.

- The crane shall be located on fully compacted area and all of the outriggers shall be fully extended equally on both sides using suitable grillage as required.

- Hooks shall have self-closing safety latches or equivalent.- Tackles/lifting equipment inspected periodically by competent person

shall be used and also checked before daily activities.

2) Crashing against workers or properties- Maintain adequate space when objects moving by cranes or trolley.- In case of crane, the rigger with tag line shall be located minimum 5 m

apart from the edge of suspended material. Other man shall be located apart from as far as possible.

- Use tag line to control the suspended material.- Banksman shall be dedicated when crane or trolley is working.

6. Scaffolding Works

1) Damage on scaffolding structure due to improper installation

- Well trained, qualified scaffolders only shall do this work.- Certified scaffold materials shall be used.- Scaffold shall be inspected before use by competent scaffold supervisor

and shall also be checked every week by an inspector.

2) Injury due to falling material during installation- Warning sign and barricade shall be placed at all times during the

erection of scaffolding.- Scaffold material shall be stocked on firm area/grating far from handrail

and opening.- Slot and hole shall be closed to maximum of scaffold floor and toe

board shall be installed all the time for prevent material from falling down.

3) Falling down of worker- Scaffolder shall wear full body harness and connect it to fixed scaffoder

or steel structure and then he shall commence work.- Scaffolder shall use fall arrester in case of suspended scaffold.

14 of 18


4) Scaffolding tag and inspection- Workers shall use scaffolds bearing green color tags.

Nobody shall be allowed to modify or dismantle any part of the scaffold. Modification and dismantling shall be undertaken only by trained and authorized persons under the supervision of a competent supervisor.

- Scaffold shall be inspected weekly, and after downpour of rain or bad weather.

5) Access through the vertical ladders ( 6 m over length)- The vertical static line and steps shall be checked daily.- Prior to using for access, the ladders shall be checked daily by

competent person.- The user shall wear safety harness and use sliding chuck during coming

up and down.

7. Installation around equipment- Before work, barricade and warning tape shall be installed around equipment

and access to this area should be controlled by watch man or supervisor.- Crane shall be well positioned on compacted ground and banksman shall

watch out not to contact spool and crane boom to equipment and steel structure.

- Pipe spool shall be controlled by two tag lines and shall be installed vertically from upper pipe to lower pipe by one or two web slings.

- All workers who install pipe spool at work at height shall wear full body harness and fix it to hand rail or structure during the work, if the platform or scaffold is not inspected and permitted by competent person. In case of permission, full body harness is not mandatory to every body. But, every body should wear full body harness in case he works outside platform and scaffold.

- Worker shall pay attention to prevent of falling material such as tool, working material from platform and scaffold. To prevent falling down of material, worker shall have a good house keeping on, platform and scaffold, minimize the volume and store material inside apart from platform and scaffold in case of storing material on platform and scaffold.

- Do not throw down any material to ground from platform and scaffold.

15 of 18


Lay down material from platform and scaffold by trolley. - Gas inside the equipment shall be removed and then tested by gas tester

before commencing work.- Equipment piping shall be installed from top to down direction.- Welding work, flange bolting and other work shall be done on equipment

platform or scaffold. In case the using of platform or scaffold for equipment erected by other contractor, the work shall be done by using man lift or

additional scaffold.- Band pipe spool tightly by using web sling before erection of pipe spool to

prevent pipe spool from slipping down to ground- Web sling is a good measures for non-slip of material from banding condition

and protection of pipe’s surface.- Rig spool after rigger confirm the tightness of banding beam by using web

sling.- The sling shall be inspected by CTSD and color coded before using and user shall check the condition of sling before using every times- Signalman(banksman) with signal jacket shall be nominated to control the

crane operation and rigging work.- Before work commence, install barricade and warning tape around working

area.- Equipment shall be protected from falling material by covering equipment with

plywood and etc.

8. Grinding and Welding 1) Fire by spatters

- Flammable materials around cutting area shall be not kept.- Fire blanket shall be used for flammable materials.- Fire extinguisher shall be prepared beside working area.- Watch man shall be nominated and check the working condition

carefully.

2) Injuries by grinding machine- Only qualified, trained and skilled worker only shall carry on that job.- Worker shall wear adequate PPE, especially full face shield, retardant

clothes and leather glove.- The change of grinding disc shall be done by competent person.- Grinding machine shall be quarterly inspected, color coded. And it shall

be inspected by user before work commence and have a adequate - guard to prevent broken disc from flying to worker, especially to worker’s

eyes. - Grinding machine, especially grinding disc shall be handled carefully

16 of 18


and well earthed to prevent electric shock.- RPM of grinding disc is higher than that of grinding machine and the

disc shall be fixed tightly.- Excessive pressure shall not be put on the disc against the working

surface.3) Fire burns and eye injuries

- Welder shall wear PPE including retardant clothes, welding apron, eye protection (welding visor) especially.

4) Electric shock - Electric machine and generator shall be equipped with ELCB and shall

be earthed by 1 m earth stake or to scaffolding’- Welding cable shall be kept dry and free from grease and oil to prevent

breakdown of insulation.- Welder and fitter shall wear dry coverall, dry safety shoes and dry

gloves.- Earth cable lines shall properly earthed and well be arranged under

scaffold, platform, working area or arranged 2 meters over from ground or platform to prevent cable from damage and worker’s tripping.

5) Toxic Fume- Adequate exhaust ventilation shall be provided.- In case adequate exhaust ventilation is not possible, welding should be

carried out by wearing suitable respiratory protection.6) Bad weather condition

- Secured ladders/man lifts shall be used for main access at heights for staging.

- SUBCONTRACTOR shall check weather forecast everyday in order to check the working condition.

9. Back Purging - After welding, the back purged gas shall be removed by compressed

air. - Nobody shall enter into the back purged pipe without removing back

purged gas and gas testing.

10.Post Weld Heat Treatment1) Usage of insulation

- Worker should wear mask when treat insulation.- Used insulation should disposed correctly.

17 of 18


2) High temperature- Heat area should be barricaded and protected round working area.- Worker wear adequate PPE, especially gloves around working area.- Not allow to keep farmable materials around cutting area.- Prepare fire extinguisher beside working area.- Do not use damaged PWHT cables and heat band.

3) Fire by over heat- Not allow to keep farmable materials around cutting area.- Prepare fire extinguisher beside working area.- Do not use damaged PWHT cables and heat band.

11.Non Destructive Examination1) Exposure to radiation

- NDE bunk shall be covered and isolated completely from workers.- Do not access NDE work area and source.

- Permit to work(PTW) of NDE shall be permitted.- The schedule of NDE shall be informed and announced to every

workers in advance.- NDE work shall be scheduled and executed especially at night or no

work time after workers finish works and go out after work.- Warning lamp, warning sign and warning tape shall be installed outside

work area before commencing NDE work. - The source shall be kept well in well protected container if possible far

from working area after operation.

11.0 ATTACHMENT 11.1 Piping Installation Around Equipment Work Flow ------------------------- 1 sheet 11.2 Pipe header spool fabrication drawing around AFC-------------------------2 sheets 11.3 Procedure for Bolt up and checking of flange parallelism------------------2 sheets 11.4 Rigging plan for around heat exchanger--------------------------------------38 sheets 11.5 Rigging plan for around AFC -----------------------------------------------------7 sheets 11.6 Task Statement (TS), Risk Assessment (RA),

Job Safety Analysis (JSA), -------------------------------------------------------4 sheets 11.7 Linde lifting limitations / Nozzles and Piping Cleanliness procedure----4 sheets11.8 Gas Purging Dam Removal Control--------------------------------------------2 sheets11.9 Instruction on Safety Valve Handing ------------------------------------------ 8 sheets 11.10 Installation Procedure for heat exchanger--------------------------------- 1 Package

18 of 18

Documents

(WMS)Piping Installation Around Eqipment Procedure(AFC)REV.F#